package c.x.jy.common.utils;

import java.security.SecureRandom;
import java.util.Base64;
import java.util.Base64.Decoder;
import java.util.Base64.Encoder;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;

/**
 * AES加解密工具类
 */
@SuppressWarnings("all")
public class AESUtil {

    /**
     * 加密
     * 1.构造密钥生成器
     * 2.根据aesKey规则初始化密钥生成器
     * 3.产生密钥
     * 4.创建和初始化密码器
     * 5.内容加密
     * 6.返回字符串
     */
  
	public static String AESEncode(String password,String aesKey) {
        try {
            //1.构造密钥生成器,指定为AES算法,不区分大小写
            KeyGenerator keygen = KeyGenerator.getInstance("AES");
            //2.根据aesKey规则初始化密钥生成器
            //生成一个128位的随机源,根据传入的字节数组
            SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
            random.setSeed(aesKey.getBytes());
            keygen.init(128, random);
            //3.产生原始对称密钥
            SecretKey original_key = keygen.generateKey();
            //4.获得原始对称密钥的字节数组
            byte[] raw = original_key.getEncoded();
            //5.根据字节数组生成AES密钥
            SecretKey key = new SecretKeySpec(raw, "AES");
            //6.根据指定算法AES自成密码器
            Cipher cipher = Cipher.getInstance("AES");
            //7.初始化密码器，第一个参数为加密(Encrypt_mode)或者解密解密(Decrypt_mode)操作，第二个参数为使用的KEY
            cipher.init(Cipher.ENCRYPT_MODE, key);
            //8.获取加密内容的字节数组(这里要设置为utf-8)不然内容中如果有中文和英文混合中文就会解密为乱码
            byte[] byte_encode = password.getBytes("utf-8");
            //9.根据密码器的初始化方式--加密：将数据加密
            byte[] byte_aes = cipher.doFinal(byte_encode);
            //10.将加密后的数据转换为字符串
            Encoder encoder = Base64.getEncoder();
            return encoder.encodeToString(byte_aes);
        } catch (Exception e) {
            e.printStackTrace();
        }
        //如果有错就返加nulll
        return null;
    }

    /**
     * 解密
     * 解密过程：
     * 1.同加密1-4步
     * 2.将加密后的字符串反纺成byte[]数组
     * 3.将加密内容解密
     */
    
	public static String AESDecode(String encryptStr,String aesKey) {
        try {
            //1.构造密钥生成器，指定为AES算法,不区分大小写
            KeyGenerator keygen = KeyGenerator.getInstance("AES");
            //2.根据aesKey规则初始化密钥生成器
            //生成一个128位的随机源,根据传入的字节数组
            SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
            random.setSeed(aesKey.getBytes());
            keygen.init(128, random);
            //3.产生原始对称密钥
            SecretKey original_key = keygen.generateKey();
            //4.获得原始对称密钥的字节数组
            byte[] raw = original_key.getEncoded();
            //5.根据字节数组生成AES密钥
            SecretKey key = new SecretKeySpec(raw, "AES");
            //6.根据指定算法AES自成密码器
            Cipher cipher = Cipher.getInstance("AES");
            //7.初始化密码器，第一个参数为加密(Encrypt_mode)或者解密(Decrypt_mode)操作，第二个参数为使用的KEY
            cipher.init(Cipher.DECRYPT_MODE, key);
            //8.将加密并编码后的内容解码成字节数组
            Decoder d=Base64.getDecoder();
            //9.解密
            byte[] byte_decode = cipher.doFinal(d.decode(encryptStr));
            return new String(byte_decode, "utf-8");
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    public static void main(String[] args) {
       String[] pwdS = {"123456"};
       String pwdd="+MBwNfJnoH9Xzz7w7TYN/g==";
        String aesKey = "aaa";
        System.out.println("key | AESEncode | AESDecode");
		/*
		 * for (String pwd : pwdS) { System.out.print(pwd + " | "); String encryptString
		 * = AESEncode(pwd,aesKey); System.out.print(encryptString + " | "); String
		 * decryptString = AESDecode(encryptString,aesKey);
		 * 
		 * // decryptString = AESDecode(pwdd,Configuration.aesKey);
		 * System.out.println(decryptString); }
		 */
     String s=     AESEncode("b002472f9dac", "98881a015af43afd74cc4a8666c63a03b4f2a2e2");
     System.out.println(s);
    // System.out.println( AESDecode(s, pwdd));
     
 //     System.out.println( new BASE64Encoder().encode(pwdd.getBytes()));
     //   String decryptString = AESUtil.AESDecode( pwdd, Configuration.aesKey);
     //  String decryptString =  AESDecode(pwdd,Configuration.aesKey);
//   /     System.out.println(decryptString+"==>  1");
    }

}
